基本信息:
- 专利标题： Electrostatic capacity type touch sensor
- 专利标题（中）：静电容量型触摸传感器
- 申请号：US13029655 申请日：2011-02-17
- 公开(公告)号：US09041683B2 公开(公告)日：2015-05-26
- 发明人： Takayasu Otagaki , Atsuhiro Ichikawa , Hiroya Ito , Kazuhiro Hasegawa
- 申请人： Takayasu Otagaki , Atsuhiro Ichikawa , Hiroya Ito , Kazuhiro Hasegawa
- 申请人地址： US AZ Phoenix
- 专利权人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- 当前专利权人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- 当前专利权人地址： US AZ Phoenix
- 优先权： JP2010-033724 20100218
- 主分类号： G06F3/044
- IPC分类号： G06F3/044
摘要：
The invention provides an electrostatic capacity type touch sensor that is not influenced by a parasitic capacitor formed between a sensor line connected to a touch sensor pad and other signal line and provides a stable sensor output. A sensor line connected to a touch sensor pad is connected to a non-inverting input terminal (+) of a charge amplifier. An LED is disposed in the touch sensor pad, and the cathode of the LED is connected to an LED signal line. Since the LED signal line is disposed adjacent to the sensor line, a parasitic capacitor is formed between the LED signal line and the sensor line. In order to keep the capacitance of this parasitic capacitor constant, a pull-up resistor is connected to the LED signal line. The LED signal line is biased to a power supply potential Vdd by the pull-up resistor.
摘要（中）：
本发明提供一种静电容量型触摸传感器，其不受在连接到触摸传感器焊盘的传感器线和其它信号线之间形成的寄生电容的影响，并提供稳定的传感器输出。 连接到触摸传感器垫的传感器线连接到电荷放大器的非反相输入端（+）。 在触摸传感器衬垫中设置LED，并且LED的阴极连接到LED信号线。 由于LED信号线与传感器线相邻配置，所以在LED信号线和传感器线之间形成寄生电容。 为了保持该寄生电容的电容恒定，上拉电阻连接到LED信号线。 LED信号线被上拉电阻偏置到电源电位Vdd。
公开/授权文献:
- US20110199331A1 ELECTROSTATIC CAPACITY TYPE TOUCH SENSOR 公开/授权日：2011-08-18